[INFO] fetching crate got-ya-id 0.1.1...
[INFO] testing got-ya-id-0.1.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate got-ya-id 0.1.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate got-ya-id 0.1.1 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate got-ya-id 0.1.1
[INFO] finished tweaking crates.io crate got-ya-id 0.1.1
[INFO] tweaked toml for crates.io crate got-ya-id 0.1.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate got-ya-id 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 10aaa3aa6cbd74eecacc05bd8f60edd8672f22e5d0021590af6ba0eed18348f4
[INFO] running `Command { std: "docker" "start" "-a" "10aaa3aa6cbd74eecacc05bd8f60edd8672f22e5d0021590af6ba0eed18348f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10aaa3aa6cbd74eecacc05bd8f60edd8672f22e5d0021590af6ba0eed18348f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10aaa3aa6cbd74eecacc05bd8f60edd8672f22e5d0021590af6ba0eed18348f4", kill_on_drop: false }`
[INFO] [stdout] 10aaa3aa6cbd74eecacc05bd8f60edd8672f22e5d0021590af6ba0eed18348f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d02f7a23b5a68a7b9cb582ce919f9b8cc1843c1b320c56695c37b21cd7943109
[INFO] running `Command { std: "docker" "start" "-a" "d02f7a23b5a68a7b9cb582ce919f9b8cc1843c1b320c56695c37b21cd7943109", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling futures-core v0.3.4
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling futures-sink v0.3.4
[INFO] [stderr]    Compiling arc-swap v0.4.2
[INFO] [stderr]    Compiling futures-task v0.3.4
[INFO] [stderr]    Compiling futures-io v0.3.4
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling smallvec v1.3.0
[INFO] [stderr]    Compiling openssl v0.10.24
[INFO] [stderr]    Compiling copyless v0.1.4
[INFO] [stderr]    Compiling safemem v0.3.2
[INFO] [stderr]    Compiling pq-sys v0.4.6
[INFO] [stderr]    Compiling unindent v0.1.5
[INFO] [stderr]    Compiling curl v0.4.28
[INFO] [stderr]    Compiling unchecked-index v0.2.2
[INFO] [stderr]    Compiling if_chain v1.0.0
[INFO] [stderr]    Compiling termcolor v1.0.5
[INFO] [stderr]    Compiling openssl-sys v0.9.49
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling curl-sys v0.4.30+curl-7.69.1
[INFO] [stderr]    Compiling mysqlclient-sys v0.2.4
[INFO] [stderr]    Compiling libsqlite3-sys v0.17.3
[INFO] [stderr]    Compiling bytestring v0.1.5
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]    Compiling unicode-normalization v0.1.9
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lock_api-0.3.4/src/lib.rs:91:34
[INFO] [stdout]    |
[INFO] [stdout] 91 | #![cfg_attr(feature = "nightly", feature(const_fn))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lock_api`
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d02f7a23b5a68a7b9cb582ce919f9b8cc1843c1b320c56695c37b21cd7943109", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d02f7a23b5a68a7b9cb582ce919f9b8cc1843c1b320c56695c37b21cd7943109", kill_on_drop: false }`
[INFO] [stdout] d02f7a23b5a68a7b9cb582ce919f9b8cc1843c1b320c56695c37b21cd7943109